Oh boy... I think ur awesome for just being able to share that and for Wong faithful, you really must love her. I think you will find your answer by asking/ answering other questions:
One: do you have children- if yes- how is this issue affecting them.
Two: How much (subjectively) are you willing to sacrifice for this relationship- are you willing to follow Mormonism the same way he does even if you feel like it hasn't hit the spot
Three: how much (objectively) should you have to do to make this work?
Four: what has she said about trusting you?
Five: does she love you?
Sixsome people have noted- it's a hit and miss: is she interested in investing in the marriage?
Seven: this whole no sex thing- was that happening before the whole pornography fiasco?
From what you at it seems like all the answers will come out quite possitively- that you both love being with each other - when it comes to broken trust- is she more bothered that you don't share the same strength of belief as her? Or that you lied?